Paleozoic Era Silurian Period (1h 1min, jan 1, 438 y BC – 1h 1min, jan 1, 408 y BC)
Description:
Formed a delta system that discharged sand and mud into the shallow seas covering the central part of North AmericaAdded to timeline:
Date:
1h 1min, jan 1, 438 y BC
1h 1min, jan 1, 408 y BC
~ 30 years